Replace the memcpy macro with a lint check.

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 399 matching lines @@
 inline D bit_copy(const S& source) {
   D destination;
   // This use of memcpy is safe: source and destination cannot overlap.
   memcpy(&destination,
          reinterpret_cast<const void*>(&source),
          sizeof(destination));
   return destination;
 }
 
 
-// A macro to ensure that memcpy cannot be called. memcpy does not handle
-// overlapping memory regions. Even though this is well documented it seems
-// to be used in error quite often. To avoid problems we disallow the direct
-// use of memcpy here.
-//
-// On Android and Windows the basic libraries use memcpy and therefore
-// compilation will fail if memcpy is overwritten even if user code does not
-// use memcpy.
-#if defined(memcpy)
-#undef memcpy
-#endif
-#if !( defined(TARGET_OS_ANDROID) || defined(TARGET_OS_WINDOWS) )
-#define memcpy "Please use memmove instead of memcpy."
-#endif
-
-
 // On Windows the reentrent version of strtok is called
 // strtok_s. Unify on the posix name strtok_r.
 #if defined(TARGET_OS_WINDOWS)
 #define snprintf _snprintf
 #define strtok_r strtok_s
 #endif
 
 #if !defined(TARGET_OS_WINDOWS)
 #if !defined(TEMP_FAILURE_RETRY)
 // TEMP_FAILURE_RETRY is defined in unistd.h on some platforms. The
@@ skipping 23 matching lines @@
 // N.B.: As the GCC manual states, "[s]ince non-static C++ methods
 // have an implicit 'this' argument, the arguments of such methods
 // should be counted from two, not one."
 #define PRINTF_ATTRIBUTE(string_index, first_to_check) \
   __attribute__((__format__(__printf__, string_index, first_to_check)))
 #else
 #define PRINTF_ATTRIBUTE(string_index, first_to_check)
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_